20289880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39019}}^1$

素因数の和:39043

約数の個数: 32

約数和(自身を含む): 49165200

約数和(自身を除く): 28875320

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39019, 78038, 156076, 195095, 312152, 390190, 507247, 780380, 1014494, 1560760, 2028988, 2536235, 4057976, 5072470, 10144940, 20289880]

約数ペア:

[(1, 20289880), (2, 10144940), (4, 5072470), (5, 4057976), (8, 2536235), (10, 2028988), (13, 1560760), (20, 1014494), (26, 780380), (40, 507247), (52, 390190), (65, 312152), (104, 195095), (130, 156076), (260, 78038), (520, 39019)]